From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx> Date: Sat, 10 Dec 2016 09:29:24 +0100 The kfree() function was called in one case by the bttv_input_init() function during error handling even if the passed variable contained a null pointer. This issue was detected by using the Coccinelle software. * Split a condition check for resource allocation failures so that each pointer from these function calls will be checked immediately. See also background information: Topic "CWE-754: Improper check for unusual or exceptional conditions" Link: https://cwe.mitre.org/data/definitions/754.html Fixes: d8b4b5822f51e2142b731b42c81e3f03eec475b2 ("[media] ir-core: make struct rc_dev the primary interface") * Adjust a jump target according to the Linux coding style convention. * Delete an initialisation for the variable "err" at the beginning which became unnecessary with this refactoring. Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx> --- drivers/media/pci/bt8xx/bttv-input.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/media/pci/bt8xx/bttv-input.c b/drivers/media/pci/bt8xx/bttv-input.c index 4da720e4867e..9187993d23ea 100644 --- a/drivers/media/pci/bt8xx/bttv-input.c +++ b/drivers/media/pci/bt8xx/bttv-input.c @@ -418,15 +418,20 @@ int bttv_input_init(struct bttv *btv) struct bttv_ir *ir; char *ir_codes = NULL; struct rc_dev *rc; - int err = -ENOMEM; + int err; if (!btv->has_remote) return -ENODEV; - ir = kzalloc(sizeof(*ir),GFP_KERNEL); + ir = kzalloc(sizeof(*ir), GFP_KERNEL); + if (!ir) + return -ENOMEM; + rc = rc_allocate_device(); - if (!ir || !rc) - goto err_out_free; + if (!rc) { + err = -ENOMEM; + goto free_ir; + } /* detect & configure */ switch (btv->c.type) { @@ -569,6 +574,7 @@ int bttv_input_init(struct bttv *btv) btv->remote = NULL; err_out_free: rc_free_device(rc); +free_ir: kfree(ir); return err; } -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
